    <html>
        <head>
            <meta http-equiv="Content-type" content="text/html; charset=utf-8">
            <link rel="stylesheet" type="text/css" href="main.css" >
            
            <title>Title</title>
        </head>

        <body>
            <h1 class="sub_title">Invalid Not Expression</h1>

            <p>This error occurs when you are trying to apply the 'not' command to something invalid.
                Remember to user parenthesis when order of operations is unsure.</p>
            <h1 class="special">Code:</h1>
            <pre class="code">
                
bool a=true, b=false, c
int i
define main {
    
# the following would cause this error
c = not i

}</pre>
        </body>
    </html>
    
